A cell is a complex system. Like most systems, a cell contains a boundary that separates things that are inside the system from those that are outside of the system. Which part of the cell functions as a system boundary?

Answers

Answer 1
the cell membrane. it protects the cell from outside substances. it controls what can enter and leave the cell.

Related Questions

what is nuclear transfer used for?

Answers

Answer:

creating clones

Explanation:

Apex

The hasting's center outlined four broad goals of medicine:

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The following are the four goals of medicine outlined by the Hasting's Center: (Hanson and Callahan, 1999) 

"1. prevention of disease and injury and promotion and maintenance of health; 
2. relief of pain and suffering caused by ill health;
3. care and cure of those suffering from a malady and care of those who cannot be cured;
4. avoidance of premature death and pursuit of a peaceful death."

Source: Health Care Policy in an Age of New Technologies (2002) by Kant Patel and Mark E. Rushefsky. 

The hellenistic philosophy advocating the avoidance of both joy and pain is called

Answers

The hellenistic philosophy advocating the avoidance of both joy and pain is called Epicureanism.

The Hellenistic philosophy that advocates avoiding both joy and pain relates to Stoicism and Epicureanism, both of which emphasize achieving tranquility through moderation and philosophy.

The Hellenistic philosophy advocating the avoidance of both joy and pain is similar to the concepts of Stoicism and Epicureanism. Both philosophies were founded in early third-century BCE Athens and shared a focus on achieving internal peace and contentment, but they approached this goal differently. Stoicism, founded by Zeno, suggested that happiness resulted from accepting fate and avoiding extreme negative emotions. On the other hand, Epicurus's Epicureanism taught that pleasure was the highest good and that a life of moderation and philosophy could achieve freedom from mental, emotional, and physical pain through ataraxia (tranquility). Both schools were influential in the Hellenistic world and sought to teach methods for reducing suffering and achieving well-being.

Which receptor type is exemplified by opening a channel to let sodium into the cell?
A. Intracellular receptor
B. Enzyme-linked receptor
C. Ion channel-linked receptor
D. Endomembrane receptor

Answers

c... I'm not completely sure though
Which receptor type is exemplified by opening a channel to let sodium into the cell?


C. Ion channel-linked receptor

A deficiency of this vitamin causes beriberi, which is characterized by weakness, swelling, and tingling or numbness in the hands and feet

Answers

Beriberi which is commonly characterized by weakness, swelling, and tingling or numbness in the hands and feet is caused by a deficiency in Vitamin B1, otherwise known as Thiamin, therefore it is also known as Thiamin deficiency. This disease may lead to peripheral neuropathy and heart failure.

Final answer:

Beriberi, characterized by weakness, swelling, and tingling or numbness in the hands and feet, is caused by a deficiency of Vitamin B1, or Thiamine. Thiamine plays a crucial role in nerve function and energy metabolism. Besides beriberi, its deficiency can lead to Wernicke-Korsakoff Syndrome, a serious cognitive disorder.

Explanation:

The vitamin deficiency that causes beriberi is a lack of Vitamin B1, also known as Thiamine. The symptoms of beriberi include weakness, swelling, and tingling or numbness in the hands and feet. These symptoms are a result of the role Thiamine plays in nerve function and energy metabolism. A severe deficiency in Thiamine can lead to nerve damage, heart failure, and even death.

In addition to beriberi, Thiamine deficiency can also lead to Wernicke-Korsakoff Syndrome, which is a neurodegenerative disorder that causes severe cognitive impairment. This condition is more common among heavy alcohol users who often have poor nutrition. Both beriberi and Wernicke-Korsakoff Syndrome can be treated with Thiamine supplements and a diet rich in Thiamine, such as lean meats, legumes, and whole grains.

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If a cell in g1 has 40 chromosomes, then at the end of meiosis i there will be _________ chromosomes in each daughter cell, and __________ sister chromatids in each daughter cell.

Answers

Given that a cell is undergoing meiosis, at the end of meiosis I, its number of chromosomes would be in half. Provided in the question that the cell in G1 has 40 chromosomes, at the end of meiosis I, there will be 20 chromosomes in each daughter cell. And each chromosome has two sister chromatids, then there will be 40 sister chromatids in each daughter cell.

Final answer:

At the end of meiosis I, a cell with an initial count of 40 chromosomes will have 20 chromosomes and 40 sister chromatids in each daughter cell. By the conclusion of meiosis II, each resulting gamete will have 20 single (non-replicated) chromosomes.

Explanation:

If a cell in G1 has 40 chromosomes, then at the end of meiosis I there will be 20 chromosomes in each daughter cell, and 40 sister chromatids in each daughter cell. This is because during meiosis I, homologous chromosomes are separated into two daughter cells, each containing one chromosome from each of the original pairs. Since these chromosomes were replicated during S phase, they consist of two sister chromatids, maintaining the chromatid count.

Subsequently, during meiosis II, these sister chromatids are separated, resulting in daughter cells that each contain 20 chromosomes that are no longer replicated. This means that by the end of meiosis II, each of the four resulting gametes will contain 20 individual chromosomes, with no sister chromatids.

Which nitrogen base replaces thymine (t) in rna?

Answers

I believe the correct answer is uracil (U)
uracil(U) replaces thymine(T)


In what way(s) are ciliates unique among the protists

Answers

Ciliates are unique in that they have two different nuclei: one for reproduction and one that takes care of general homeostasis. Ciliates have one or more large contractile vacuoles which collect water and expel it to maintain the osmotic pressure in the cell. Ciliates have cilia to move around.

A typical action potential of a myocardial contractile cell lasts ________ millisecond(s).

Answers

it has to be at least 200

Three organelles (cell parts) found in plant cells, but not animal cells?

Answers

1. The Cell Wall.

Plants have a cell wall in order to maintain rigidity and stability. Animal cells do not have a cell wall because they have a different structure, which makes them more flexible and able to move around easier.

2. Chloroplasts

Since plants cannot move, they get their energy from the sun. This energy is made inside of the chloroplasts. Animal cells don't have chloroplasts because their energy comes from other organisms.

3. Central Vacuole

The central vacuole provides structure and holds materials and wastes, and also decomposes those wastes. Animal cells don't have a central vacuole because they have lysosomes and normal vacuoles that do the same function.


A common ancestor is evident when comparing __________________ of different species in the phylum Chordata, especially in the early stages.
A) embryos
B) fossils
C) motility
D) protein structure

Answers

Phylum chordata: characterized by the presence of a "notochord", pharyngeal slits, post-a*** tail, and a hollow nerve chord associated with the organisms back(dorsal).  

A common ancestor is evident when comparing __________________ of different species in the phylum Chordata, especially in the early stages.
A) embryos - animals in the phylum Chordata have 4 features that appear some point in their development. Usually, this point occurs embryogenesis.
B) fossils - This is the only other semi-likely answer because one would be able to see animal structure. However, the phrasing of this questions doesn't allow for this to be the answer.  The question specifically mentions "early stages" which aren't possible in fossils. 
C) motility - Incorrect because motility does not show the physicical attributes associated with the phylum. 
D) protein structure - incorrect because motility does not show the physicical attributes associated with the phylum. 

The answer here must be embryos

Hope this helped!






Fossils are the evidences that  help to detect the phylogeny.  A common ancestor is evident when comparing  fossils  of different species in the phylum Chordate, especially in the early stages.

What is phylogeny ?

Phylogeny is the representation of evolutionary history and relationships between the groups of a tree that help to detect the evolutionary history of the species.

Fossils are helpful in detecting the phylogeny relationship between the species and the divergent evolution and convergent evolution helps to detect the history of the organism.

The tree depicts that the phylogeny tree are helpful in predicting the history of species and the human evolutionary history is able to found by the phylogeny tree as well through the studies of fossils.

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The area in which certain types of plants or animals can be found living in close proximity to each other is called a
Select one:
a. community
b. habitat
c. kingdom
d. niche

Answers

Final answer:

The area in which certain types of plants or animals can be found living in close proximity to each other is called a habitat.

Explanation:

The correct answer is b. habitat.

A habitat is the specific area or environment where particular plants or animals naturally live and interact with each other and their surroundings. It provides all the necessary resources, such as food, water, and shelter, for the organisms to survive and reproduce.

For example, a coral reef is a habitat for various marine species, including fish, corals, and sea turtles. The plants and animals within a habitat form a community, which refers to all the different species living together in a particular area.

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Taking certain drugs during pregnancy is likely to expose unborn children to

Answers

a child would be born with birth defects

What could cause your throat to hurt?

Answers

Maybe because of the lack of water your drinking, But it can be many various reasons. For example, if you consume something large without chewing it. It could cause your throat to hurt because its trying to force that food into your digestive system.
Final answer:

A sore throat can be caused by a viral or bacterial infection, or an allergic reaction. Common symptoms of a sore throat include pain, fever, congestion, and body aches.  If the sore throat is severe or long-lasting, it may require medical attention.

Explanation:

A sore throat could be caused by a range of conditions. Firstly, viral infections such as common colds, influenza, mononucleosis or conditions like measles, chickenpox, and croup often result in a sore throat. These typically come with additional symptoms like a fever, runny nose, cough, and muscle aches.

Secondly, a sore throat can often be the result of bacterial infections. For instance, Streptococcal infections damage the mucosal membranes of the pharynx and cause symptoms such as a high fever, intense pharyngeal pain, and swollen, dark-red palatine tonsils.

Lastly, allergies can cause your throat to hurt. Your throat can swell up and become sore if you have a strong response to an allergen, and this can potentially be life-threatening if you can't breathe as a result.

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When pregnant rats drink alcohol, their young offspring later display a(n)
a.immunity to fetal alcohol syndr?

Answers

I would assume so but I could be wrong

When pregnant rats drink alcohol, their young offspring later display a liking for the taste and odor of alcohol. Thus, the correct option is A.

What effects does alcohol abuse cause?

Drinking too much alcohol during the pregnancy in rats increase the risk of miscarriage, premature birth of the rats and the baby also having a low birthweight and other diseases.

The effects of alcohol abuse include brain damage, and problems with the growth and development of the fetus, birth defects in fetus, like heart defects, hearing problems, or vision problems, fetal alcohol spectrum disorders, low birthweight (LBW). Also, the consumption of alcohol by pregnant rats will result into liking for the taste and odor of alcohol by the offspring.

Therefore, the correct option is A.

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Your question is incomplete, most probably the complete question is:

When pregnant rats drink alcohol, their young offspring later display a(n)

A) liking for the taste and odor of alcohol.

B) aversion to the taste of alcohol.

C) immunity to fetal alcohol syndrome.

D) unusually rapid development of bladder control.

The term "brown bread" on a label is a guarantee that the bread has been made with whole-grain flour.​
a. True
b. False

Answers

A- true, the term brown bread on a label is guarantee that the bread has been made with whole-grain flour

The term "Brown bread" on a label is a guarantee that the bread has been made with whole-grain flour. Thus, the given statement is false.

What is Brown bread?

Brown bread is made from the parts of the wheat grains which include bran, endosperm, and germ, so it is brown in color. Brown Bread is made from the whole wheat flour which is the wheat grains that are not processed to remove bran and germ layer.

Brown bread is made through whole wheat, with their outer covering intact in the bread. This makes brown bread more nutritious and rich in fiber content as compared to white bread. Brown bread contains more amount of vitamin B6 and E, magnesium, folic acid, zinc, copper, and manganese.

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A student constructs a Venn diagram to compare the organelles in plant and animal cells. Venn Diagram of Plant and Animal Cells Which organelle should be listed under “Both” Plant and Animal cell

A.centriole
B.mitochondrion
C.chloroplast
D.cell wall

Answers

B. Mitochondrion because both cells need the function. I may be a beginner but I actually study cells. Also, both cell always needs the production of the energy.

Answer: The correct answer is-

B) mitochondrion.

Mitochondria is a membrane bound specialized organelle that is present in both animal as well as plant cell.

It is considered as power house ( energy producing factory) of the cell as it produces large amount of energy (in the form of ATP) through metabolic process called cellular respiration. This energy is further utilized for driving various cellular processes.

Thus, option B) is the right answer.

Which field of study would be most useful to a person who wants to work with sea turtles? A. Zoology B. Geology C. Botany D. Meteorology

Answers

I believe the best answer would be A. Zoology. Let me know if this helps.

Answer:

Zoology

Explanation:

Zoology is one of the aspects of biology that is concerned with the study of animals with respect to their structure, function, morphology, anatomy, behaviour, etc.

Sea turtle is an animal. Hence, if someone wants to study or work on sea turtles, he must go for zoology.  

The ________ is a region of dense bone that surrounds and protects the membranous labyrinth.

Answers

The osseous labyrinth is a layer of bone in the inner ear that protects and encases the membranous labyrinth. The membranous labyrinth is a group of fluid filled tubes and chambers which contain the receptors for equilibrium and hearing.

Define the components of biodiversity. what is the significance of biodiversity as a potentially renewable resource?

Answers

variety or different species, genetic variability among individuals among species,variety of ecosystems,functions needed for the survival of said species, and biological communities

Match the term to the example sequence. assume you have a gene of interest that reads (in part): atg tgg ctg question 1 options: ugg (mrna) acc (trna) tgg (dna) tryptophan acc (dna) 1. complementary triplet 2. template triplet 3. codon 4. anti-codon 5. amino acid

Answers

So do you need it today?

depending on the organism the number of in a cell may change

Answers

it may change the chromosomes.

The answers are:

nucleus

genes

chromosomes

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Explanation:

Got them all Correct

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The nurse is reviewing the medication administration record (mar) of a client at 39 weeks' gestation and notes that she is ordered an opioid for pain relief. which is an assessment priority after administering?

Answers

The priority after administering is to assess fetal heart rate. After administering an opioid to a laboring mother, the main concern is to evaluate the effect on the fetus. Opioid administration can cross the placental obstruction with signs as well as measuring heart rate and variability. Subsequently after birth, there may be a reduction in attentiveness. Maternal factors of a reduced blood pressure, constipation and dry month are of a lesser importance.

A model that helps explain the results of Mendel’s crosses is called a ______.

Answers

It should be a Punnett square
Punnett Square is the answer

What is the scientific name for rust? is it Uredinales? or Iron oxide?
(when doing the kingdoms and domains thing?)
Please answer as soon as possible.... Please...

Answers

Rust is another name for iron oxide,
hope i helped and warm wishes to you

The scientific name for rust is iron oxide, specifically iron(III) oxide (Fe₂O₃), not Uredinales. Uredinales refers to a type of fungus affecting plants. Iron oxide forms when iron reacts with oxygen in the air.

The scientific name for rust is iron oxide, specifically in the form of iron(III) oxide with the chemical formula Fe₂O₃.

Iron oxide is often known as rust, a reddish substance found on corroded metal.Rust is a word used to describe the flaky, crusty, reddish-brown product that forms on iron when it reacts with oxygen in the air.Uredinales, on the other hand, refers to a type of fungus that affects plants and is not related to the rust found on metals.

Therefore, the correct term for the reddish substance you see on corroded metal is iron oxide, not Uredinales.

A key element in the use of biofeedback is teaching a person to induce a state of ________ to help gain control over biological functions.

Answers

The answer is relaxation. Relaxation is a known key element in using biofeedback therapy. Being relaxed teaches the person to help regain over biological function. Biofeedback Therapy is a non-drug therapy, wherein a patient learns how to control bodily processes, which are normally involuntary, one of the known therapeutic benefits of biofeedback is that it can help people with high blood pressure.

The part of the brainstem that controls heartbeat and breathing is called the

Answers

Hello!

The brainstem that controls those functions, as well as others is known as the medulla. The Medulla is the lower half of the brain. This stem is connected to the spinal cord, so if damaged will more than likely result in death/brain death,

I hope this helped!

I am, yours most sincerely,
SuperHelperThingy

The medulla oblongata is the part of the brainstem that controls heartbeat and breathing. The brainstem, which includes the medulla along with the pons and midbrain, is responsible for various autonomic functions and connects the brain with the spinal cord.

The portion of the brainstem that controls heartbeat and breathing is called the medulla oblongata. This structure is part of the hindbrain and it manages critical autonomic functions such as regulating the heart rate and respiratory rhythm. The brainstem, the oldest and innermost region of the brain, connects with the spinal cord and is essential for many unconscious functions including the ones controlled by the medulla, like heartbeat and breathing, but also comprises other structures like the pons and midbrain, which are involved in different autonomic and motor control tasks. The pons, located above the medulla, plays a crucial role in body movement and balance.

Positive correlations have been found between ____ and health outcomes.

Answers

The answer is called Social Support. Hope this helps.
Hello!

The correct answer for the blank is: Social support.

I really hope this helped you out! c:

What is proteins that move needed substances or waste materials through the plasma membrane?

Answers

Final answer:

Transport proteins are responsible for moving substances through the plasma membrane. They can function as channels or carriers to facilitate the passage of molecules.

Explanation:

The proteins that move needed substances or waste materials through the plasma membrane are transport proteins.

These transport proteins can function as either channels or carriers. Channel proteins form a hydrophilic channel through the phospholipid bilayer, allowing polar compounds to pass through. Carrier proteins bind with the substance and aid its diffusion through the membrane.

Examples of transport proteins include aquaporins, which allow water to pass through the membrane, and pumps that work against electrochemical gradients for active transport.

Biology students used raw eggs in an experiment on tonicity and osmosis. The students put their eggs into vinegar to remove the shells. The vinegar was used to remove the shell form the raw egg. What other effect(s) did the vinegar have on the egg?

Answers

The vinegar turned the white part of the egg clear, so you can see into it.

The egg swells up. The movement of particles from its higher concentration to the lower concentration through a semi-permeable membrane is known as osmosis. As the vinegar outside the egg has higher concentration of water molecules than the concentration of water molecules inside the egg hence to maintain the equillibrium, water molecules move inside the egg from the vinegar, which results into the swollen egg.

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